Originally Posted by Montague
But as a hobby business, it might work.
yes it would......
i do kind of the same thing, though not trailers, or any item specifically. im a mechanic by trade (for now, its taking its toll on my body) but sometimes i get commissioned to build something, a go kart trailer, luggage rack system/panniers, a bicycle sidecar. it doesnt pay the bills, but it gives me something to do while im making it, and puts some money in my pocket for other equipment/tools etc.
so put it out there, offer your services, and see what happens. the work looks good, and i think people would be into it.